PERMATIGHT cable gland seal Back to products list Gasket for water and gas valves Ø of operating screw: 22 to 50 Material: polyurethane (PUR) Supplied on a mounting tube for easy installation without damaging the product Advantages : Perfect sealing of gate and valve stems (even at low pressures) Can be mounted in any conventional stuffing box Ensures complete, constant and sufficient lubrication No wear because no friction on the stem No seizure No jamming